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This article mainly explains "Linux-driven development how to learn", the content of the article is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in-depth, together to study and learn "Linux-driven development how to learn" it!

1. Learn to write simple makefile

two。 Write an application program that can run with makefile

3. Learn to write driven makefile

4. Write a simple char driver, makefile compiled through, can insmod, lsmod, rmmod. Print hello world in the driver's init function, and after insmod, you should be able to see the output through dmesg.

5. Write a complete driver, plus the driver implementation of read, write, ioctl, polling and other functions. Complete the implementation of transferring structures from user space to kernel space in ioctl.

6. Write a block driver, plus read,write,ioctl,poll and other functions to achieve.

7. Easy to learn memory management, this is the most difficult, understand a variety of memory alloc function implementation details. This is the basic skill of Linux development.

8. Learning the application of the lock mechanism, which is not the most difficult but the most error-prone, involves a lot of synchronization and concurrency problems.

9. Look at the driver code for practical applications in the kernel. You will find that the most basic you already know, the big framework is the same, nothing more than the implementation of read, write, ioctl and other functions, but it contains a lot of small implementation details that I didn't know before. At this point, you have to consider many other issues, not just the implementation of basic functions.

It is recommended that you take a look at a driver kvm of integrated in 2.6.20. Remember that it is under driver/lguest. It is fun to see the virtual machine driver under Linux. The code is not long, but the function is powerful. Those who have the ability can write an operating system to make a disk image and load it into the virtual machine as required, and then the client can have its own 4G virtual address space.

Thank you for reading, the above is the content of "how to learn Linux driver development". After the study of this article, I believe you have a deeper understanding of how to learn Linux driver development, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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